When I turn on the air conditioning, the engine seems to sound different

[Mustang Qi]

My car is a 2020 Mustang GT, and every time I turn on the air conditioner, winter or summer, I feel the sound of the engine getting thicker and the car getting more powerful. But if I don't turn on the air conditioner, it seems to become different. It's hard for me to describe that feeling. Does anyone have a similar feeling?

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[glockholiday]

The A/C compressor is a load on the engine, some estimate like 20hp so yeah it has to adjust the throttle slightly to maintain idle rpm

 

[White_Bear_92]

Completely normal. My exhaust gets a little more rumbly if I turn mine on as well.

 

[Angrey]

I'm assuming it's the same for the GT's, but on the 350 there's a separate set of torque tables with the A/C on.

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